Spray-gun.



L- C. HULL.

SPRAY GUN.

APPLICATION FILED MAR. 20. I917- Patented Jan. 15, 1918 WQW 7 2% x22 abbot/"M34 WED can arana @IFFTGEQ,

JOHN C. HULL, 01E GASPORT, NEW YORK.

SPRAY-GUN.

Specification of Letters Patent.

'Patented Jan. L5, 1918.

' Application filed March 20, 1917. Serial No. 156,083.

To all whom it may concern: Be it known that I, JOHN C. HULL, a c1t1- zen of the United States, residing at Gasthis application is a gun or nozzle, adapted to be employed primarily for spraying.

The invention aims to provide novel means whereby the character of the spray and the range of the spray may be adjusted.

Another object of the invention is to provide novel means whereby the flow of liquid through the device may be cut ofl' readily at will. 7

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the aboveand other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in longitudinal section, a spray gun constructed'in accordance with the present invention, parts being broken away, and the constituent elements of the device being in the positions which they will assume when the flow is cut ofi Fig. 2 is a fragmental longitudinal section, similar to Fig. 1, but showing'the parts in the positions which they will assume when there is a flow of liquid through the structure;

Fig. 3 is a cross section taken approximately on the line 33 oflEig. 2;

Fig. 4 is a rear elevation of the disk which controls the passage of liquid through the device and r Fig. 5 is a section taken approximately on the line 5-5 of Fig. 4.

In carrying out the present invention there is provided a barrel 1 which need not be more than a foot or two in length. Assembled by threading or otherwise with the rear end of the barrel 1 is acoupling 2 carrying a gland 3, the coupling 2 being providedwith a lateral inlet 4.

Connected by threading or otherwise to the forward end ofthe barrel 1 is a head, denoted generally by the numeral 5, the

head 5 being a composite structure and in-' eluding a casing 6. Mounted-in the casing 6 near to the inner end thereof and if desired constituting an integral part of the casing, is a spider 7. In front of the spider 7, the casing 6 is supplied with cam ribs 8.

Connected with the outer end of the casing ti by threading or otherwise, and constitutmg a part of the head 5 is a cap 9 having a relatively large opening 10 across which extends a diaphragm 11, the diaphragm 11] being bound between the forward wall of the cap 9 and a gasket 14, which abuts against the forward end of the casing 6. The diaphragm 11 is provided with a central opening l2'which is of relatively small diameter, compared withthe opening 10 in the cap 9. The space within the contour of the gasket 14 to the rear of the diaphragm 11 constitutes a chamber 15. Disposed within the casing 6 at the forward end thereof and abutting against the gasket 14 is a disk 16 having apertures 17 therein. -Theapertures 17 preferably are disposed in a circle, and the apertures extend obliquely through the disk, as indicated at 18 in Fig. 5. The disk 16 has a central opening 24 which is flared at its rear end as at 25.

The invention comprises a plunger which preferably is in the form of a rod 26 slidable longitudinally in the gland 3 and mounted to rotate therein, the rod 26 carrying an exterior handle 20, The forward end of the rod 26 is received within a tubular socket 21 mounted to rotate and to slide longitudinally in the spider 7. The socket 21 is held on the forward end of the rod 26, removably, by means of a cross pin 22 inserted through the socket and through the forward end of tlfe rod. The cross pin 22 constitutes a projection, cooperating with the cam ribs 8 in a manner which "will be set forth hereinafter.

' Mounted in the forward end of the socket 21 and abutting against the forward end'of the rod 26 is a valve 23 which may be made of rubber or other suitable material.

Let it be supposed that the rod 26 has been retracted by means of the handle 20, so that the forward end of the socket 21 and the valve 23 are retracted from the opening 24. in the disk 16, as shown in Fig. 2. Then, a considerable volume of 1i uid, delivered from the barrel 1, and received by the barrel, through the inlet 4, passes through the opening 24 and out of the openis broken up, depends upon the volume ofthe stream, and the volume of the stream is regulated by the distance that the socket 21 is advanced, the range is lessened and the stream proceeding through the opening 12 1s broadened out, so as to cover a greater area.

The socket 21 may be advanced in two. ways. First, this 0 eration may be carried out by giving a direct right line sliding movement to the rod 26, under which circumstances, the ends of the cross pin 22 will move forwardly off the cam ribs 8. Secondly, the rod 26 may be given a rotary motion, under which circumstances, the ends of the cross pin 22 will ride around on-the cam ribs 8. It will be seen from the foregoing that the operator has under his control, a means whereby the part 21 may be the same enters the opening 24 in the disk advanced slowly and with a fine degree of adjustment, and whereby, if desired, the part 21 may be advanced abruptly. It is to be observed, further, that the o erator can first advance the part 21 slowly, y rotating the rod 26, and at any time he can complete the forward movement of the rod 26 and the part 21 by a straight line forward thrust. When the part 21 is advanced sufliciently,

16, and the valve 23 is pressed against the rear face of the diaphragm 11, thereby closing the o ening 12. If the rod 26 has been advanced by a straight line movement, with the ends of the cross pin 22 in alinement with the ends of the cam ribs 8, then the rod 26 can be retracted by a similar movement. If, however, the rod 26 has been 'advancedby a rotary movement, the ends of the cross pin 22 riding on the cam ribs 8, when the valve 23 abuts against the rear face of the diaphragm 11 the valve will constitute a secure closure for the opening 12,

and under such circumstances, the rod, the

socket 21 and the valve 23 can be retracted only by imparting a reverse rotation to the rod 26.

' The disk 16 does not tend to rotate as the liquid passes through the obliquely disposed opening 17, because the pressure of the'ad- 'vancing liquid holds the disk against the with the outlet, the disk being provided with obliquely disposed openings arranged about the-central opening, the disk being spaced from the forward end of the head; a plunger mounted to rotate in the barrel, the forward end of the plunger being movable into and out of the central opening in the disk, and constituting a closurefor the outlet; and a projection carried by the plunger and coacting with the cam to advance the plunger when the plunger is rotated.

j 2. A spray gun comprising a barrel; a head carried by the barrel and having an outlet in its forward end, the head being provided with a cam; a disk in the head having a central opening which is coaxial with the outlet, the disk being provided with obliquely disposed openings arranged about the central opening, the disk being spaced from the forward end of the head; a plunger mounted to slide endwise and to rotate in the barrel, the forward end of the plunger being movable into and out of the central opening in the disk, and constituting a closure for the outlet; and a projection carried by the plunger, the projection coacting w1th the cam to advance the plunger, the plunger being capable of endwise forward movement with respect to the cam when the plunger is retracted from the outlet.

'3. A spray gun comprising a barrel; a head carried by the barrel and having an outlet in its forward end, the head" being provided with a cam; a disk in the head having a central opening which is coaxial with the outlet, the disk being provided with obliquely disposed openings arranged about the central opening, the disk being spaced from the forward end of the head;

-a rod mounted to rotate in the barrel; a

socket carried by the forward end of the rod, the socket being movable into and out of the central opening in the disk; a valve carried by the socket and constituting a closure for the outlet; and a pin inserted through the socket and engaging the rod, the outer end of the pin being adapted to .ride on the cam, to constitute a means for advancing the socket and the valve when the rod is rotated.

4. A spray gun provided with inner and outer disks havi g coaxial main openings, the inner disk having obliquely disposed auxiliary openings, arranged about the main opening of the inner disk, the outer disk having a flat rear face; a plunger movable into and out of the main opening of the inner disk and controlling the flow there through and through. the outer disk; the plunger having on its end a resilient plug of greater diameter than the opening of the outer disk, the plug having a flat forward 10 face engaging the flat rear face of the outer disk to form a closure for the opening of the outer disk. 7

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

JOHN C. HULL.

Witnesses:

G. ALBERT HULL, Anion DUNBAR. 

